CN100512403C - Method and apparatus for changing channels in a system operating in a recording mode - Google Patents

Abstract

An apparatus and method for selecting one of a plurality of digital and analog video channels in response to user selection, particularly when operating in a digital recording mode. The user may select channels using a channel scan mode (where the user's selection results in selection of the next channel in the channel order) or a direct channel mode (where the user enters a specific channel number to be selected). When operating in recording mode and the device receives a channel selection in channel scan mode, the device selects the next digital channel in sequence and skips any intervening analog video channels. When operating in recording mode and the device receives a channel selection in direct channel selection mode, the device selects the channel and terminates recording mode if the selected channel is an analog channel, or if the selected channel is a digital channel, then keep recording mode. The present invention also provides a method for controlling content in a buffer of a storage device when a user scans through primary and secondary television channels.

Description

Method and apparatus for changing channels in a system operating in recording mode

This U.S. non-provisional patent application claims priority benefit to U.S. Provisional Patent Application Serial No. 60/532,228, filed December 23, 2003, entitled "Method and Apparatus for Changing Channels in a System Operating in PVR Mode" .

technical field

The present invention relates to a method and apparatus for selecting one of a plurality of digital and analog video channels in response to a user selection. The user selection may correspond to a channel selection command using either the channel scan mode or the direct channel selection mode, and may be received during recording operation of the system.

Background technique

In video broadcasting and processing applications, digital and/or analog video signals are transmitted and received on predetermined video signal channels. The term digital video channel used here refers to a signal channel for transmitting a digital video signal such as a video signal encoded according to MPEG-2 (ISO/IEC 13818-1/2). The term analog video channel as used herein refers to a signal channel for transmitting an analog video signal such as a video signal conforming to the NTSC standard.

In conventional analog systems such as NTSC compliant, video channels occupy a 6 MHz bandwidth and it is within this bandwidth that the corresponding program signal associated with the signal channel is carried. In contrast, in a digital system, the 6MHz bandwidth can be used to carry several sub-channels, each sub-channel is used to carry its own program signal. The bandwidth can be divided using a time multiplexed transport stream that carries the program signals associated with the various sub-channels. The concept of sub-channels will be further described here. In addition, bandwidth allocation can be dynamically changed to accommodate changes in broadcast program demand.

Television receivers typically allow a user to select channels using at least two modes, a channel scan mode and a direct channel selection mode. In channel selection mode, the receiver responds to a channel up (up) or channel down (down) command to select or tune to the next signal channel in the list of available video channels. The list of available video channels may correspond to a simple arrangement of channels by frequency spectrum, or may be determined in other ways. The channel scan list may be any list of channels designated for sequential selection, or tuning (such as, but not limited to, a user-specified list of favorite channels), or a list of recommendations generated in an electronic program guide. The channel scanning operation may automatically tune to the channels in the list every predetermined time period sequentially, wherein the sequential tuning is performed until a specific channel is selected by the user. In systems including digital video channels and analog video channels, the selected channel type may be changed in response to a channel scan command. In the direct channel selection mode, the receiver selects or tunes to a specific channel number in response to user input of the channel number.

In general, it is highly desirable to be able to record digital television broadcasts because of the high picture quality, widescreen aspect ratio and high audio quality associated with these broadcasts. However, it is not possible to record digital television broadcasts (ATSC, QAM) using conventional VCRs because these conventional VCRs do not include a built-in digital tuner. It is possible to record digital television broadcasts using digital storage devices such as audio/video hard drives ("AVHDDs"). Because of its ability to capture and manipulate digital video with relative ease, AVHDD enables the user to exercise a great deal of control over the playback of programs. Devices that use such hard drives for recording television programs are often referred to as personal video recorders (PVRs) or digital video recorders (DVRs). It has become very popular recently. In these devices, the received video signal is continuously stored in the buffer, so that the user can operate the received video signal at any time, that is, pause, replay, skip, etc.

In general, current DVR devices receive and record video signals that have been processed by the receiving device, usually in analog form. It would be highly desirable to provide a method and apparatus which allow direct recording of received digital video signals. However, there are various challenges with such a system, including: how to handle channel changes during recording mode when the user selects an analog channel; changes; and how to handle buffers for storing video signals when channel changes, especially when PID filtering (filtering) is enabled. The present invention will solve these problems and provide a method and apparatus for dealing with the above-mentioned problems.

Contents of the invention

The present invention provides a method and apparatus for connecting a digital storage device to a television set via a digital bus to enable the digital storage device to store received program data, thereby providing a PVR function. The television set may operate in a recording mode when the user selects a digital video channel or when the user selects a predetermined key or set of keys on the remote control. The present invention provides (method and apparatus for) processing of storage of program data in an environment including multiple digital video channels and multiple analog video channels. Digital video channels can include multiple sub-channels and can be designated using major and minor channel numbers. In an alternative embodiment, the digital storage device may be included in the television set.

In particular, the present invention provides a method for controlling a television set comprising the steps of: selecting a plurality of digital One of a video channel and an analog video channel; in a digital recording mode, transfers a program signal received via a selected digital video channel to a storage device via a digital bus; when in a digital recording mode, selected in response to user input A new video channel of one of multiple digital video channels and analog video channels, where the next digital video channel in the channel scan order is selected if the channel scan mode is used, and skips between the currently selected video channel and the Any intervening analog video channels between the next digital video channel in the channel scan sequence and remain in digital recording mode. If the user input uses the direct channel selection mode, and the selected channel corresponds to an analog video channel, then select the analog video channel and terminate the digital recording mode, and if the selected channel corresponds to a digital video channel, select the digital video channel and The digital recording mode remains.

The present invention also provides an apparatus comprising: receiving means for receiving user input including a channel selection command using one of a channel scan mode and a direct channel mode; for selecting a plurality of digital video channels in response to the channel selection command one of a channel and an analog video channel, and means for acquiring a program signal associated with the selected one of the video channels; for transferring the selected program signal to a storage device via a digital bus when the device is in recording mode The transmission means of equipment; And be connected with receiving means, selection means and transmission means, be used for the control means of controlling the operation of this equipment in response to user input, wherein if the channel selection order that receives uses channel scanning mode, then selection means selects The next digital video channel in the channel scan sequence, and any intervening analog video channel between the currently selected video channel and the next digital video channel is skipped, and digital recording mode remains. If the channel selection command received uses the direct channel selection mode, and the selected channel corresponds to an analog video channel, the selection means selects the analog video channel and terminates the digital recording mode, and if the selected channel corresponds to a digital video channel, then The selection means selects the digital video channel and the means remains in digital recording mode.

Description of drawings

By referring to the following description of the embodiments of the present invention in conjunction with the accompanying drawings, the above-mentioned and other features and objects of the present invention and the manner of obtaining them will become more apparent, and the present invention itself will be more easily understood, wherein:

Figure 1 is a simplified block diagram of an exemplary television system and storage device in which the present invention may be embodied;

2 is a block diagram illustrating the use of an IEEE1394 compatible set-top box (cable box)/satellite box (satellite box) as a TV tuner;

FIG. 3 is a block diagram illustrating the use of an IEEE1394 compatible set-top box/satellite access box in PVR mode in accordance with the principles of the present invention;

4 is a block diagram illustrating the use of an IEEE1394 compatible set-top box/satellite access box as a TV tuner in PVR mode in accordance with the principles of the present invention; and

Figure 5 is a flowchart of an exemplary mode of operation of the present invention.

Corresponding reference characters indicate corresponding parts throughout the drawings. The examples set forth herein illustrate various embodiments of the invention, but these examples are not to be construed as limiting the scope of the invention in any way.

Detailed ways

1 is a block diagram of a digital video receiving system for demodulating and decoding broadcast signals in accordance with the principles of the present invention. Although the disclosed system is described in the context of a system for receiving video signals transmitted in digital video channels and analog video channels, this is exemplary only. Digital video signals can be of various types. For example, it may conform to the High Definition Television (HDTV) Signaling Standard, a digital television standard for HDTV transmission established by the Advanced Television Systems Committee (ATSC) on April 12, 1995, or other ATSC standards. Alternatively, the digital video signal may also be tailored to the needs of the owner or customer of a particular system.

The principles of the invention can be applied to terrestrial, cable, satellite, Internet or computer network broadcast systems where the coding type or modulation format can be changed. Such systems may include, for example, non-MPEG compliant systems that incorporate other types of encoded data streams and other methods for conveying program specific information. Furthermore, although the disclosed system has been described in terms of processing broadcast programs, this is exemplary only. For example, the term "program" is used to refer to any format of packetized data such as audio data, telephone messages, computer programs, Internet data, or other communications.

In general terms, in the video receiver system of FIG. 1, a broadcast carrier modulated with signals carrying audio, video and associated data representing the broadcast program content is received by antenna 10 and processed by unit 13. The final digital output signal is demodulated by demodulator 15 . The demodulated output from the unit 15 is trellis decoded and mapped to a byte length data field, de-interleaved and Reed-Solomon (Reed-Solomon) error correction is performed using the decoder 17. The corrected output data from unit 17 is in the form of an MPEG compatible transport stream comprising a program representing multiplexed audio, video and data portions. The transport stream from unit 17 is demultiplexed by unit 22 into audio, video and data portions, which is further processed by other elements of decoder system 100 . In one mode, decoder 100 provides MPEG decoded data for display and audio reproduction on units 50 and 55, respectively. In recording mode, the transport stream from unit 17 is processed by decoder 100 to provide an MPEG compatible data stream to memory on storage medium 105 via storage device 90 . Such systems are known, such as the RCA ATC32X HDTV receiver manufactured by Thomson, Inc. of Indianapolis, Indiana.

In this exemplary embodiment, the connection between storage interface 95 and storage device 90 is via an IEEE1394 connection. The IEEE1394 connection is a well-known digital data bus and allows digital data to be transferred between the television receiver and storage device 90 . Other suitable digital data buses including, but not limited to, USB, Ethernet, etc. may also be used. The storage device 90 is an AVHDD device having one or more hard disks therein for storing video data. The storage device 90 includes a temporary buffer for storing currently received video data providing PVR-related functions. The temporary buffer is filled and emptied as described below. Other suitable storage devices may also be used, including but not limited to solid state memory, rewritable optical discs, and the like. In the exemplary embodiment, storage device 90 is a separate component connected to the television receiver via a digital bus. In an alternative embodiment, the storage device may be included as part of the television receiver.

In the exemplary embodiment, once the user selects a digital video channel, the device enters a recording mode. When the device is in recording mode, the received video data is automatically stored in a buffer of the memory device 90 as it is received. The television receiver can then process and display the video data from the buffer in response to user commands, thereby providing PVR-related functions, such as pause, fast-forward, and rewind of the currently received video. The recording mode may be entered using alternative methods, such as in response to user activation of a record button on the remote control unit 70, or user selection of a designated button on the remote control unit 70, such as a transmit button (pause, slow forward, etc.) , FF, Rewind, Instant Replay, etc.).

In order to watch TV channels or menus such as a program guide on the screen, the user makes selections by using the remote control unit 70 . Processor 60 uses the selection information provided by remote control unit 70 via interface 65 to appropriately configure the elements of FIG. 1 to receive the desired viewing programming channel. The processor 60 includes a processor 62 and a controller 64 . Unit 62 processes (ie analyzes, compares and compiles) program specific information including program guides and system information, while controller 64 performs the remaining control functions required in the operation of decoder 100 . Although the functions of unit 60 may be implemented as separate components 62 and 64 as depicted in FIG. 1, alternatively, the functions of components 62 and 64 may be implemented in a single processor. For example, the functionality of units 62 and 64 could be incorporated into programmable instructions of a microprocessor. Processor 60 configures processor 13, demodulator 15, decoder 17 and decoder system 100 to demodulate and decode input signal formats and encoding types. The above elements are configured separately for the input signal type by the processor 60 using the bidirectional data and control signal bus C to set the control register values of the subunits in the units 13, 15, 17 and decoder 100.

The transport stream provided to decoder 100 includes data packets containing program channel data and program specific information. Unit 22 directs the program specific information packets to processor 60, which analyzes, compares, and compiles this information into a hierarchically arranged table. The compiled program specific information is used to identify and compile individual data packets containing user-selected program channels. The program specific information includes conditional access, network information and identification, and linking data that enable the system of FIG. 1 to tune to a desired channel and assemble data packets to form a complete program.

Considering FIG. 1 in more detail, a carrier wave modulated with a signal carrying a program representing audio, video and related data received by antenna 10 is converted to digital form and processed by input processor 13 . Processor 13 includes a radio frequency (RF) tuner and intermediate frequency (IF) mixer and amplification stages for downconverting the input signal to a lower frequency band suitable for further processing. In this exemplary system, the input signal received by antenna 10 includes 33 physical transmission channels (PTC 0-32). Each Physical Transmission Channel (PTC) is allocated a bandwidth of 6 MHz and comprises, for example, a maximum of 6 sub-channels.

For exemplary purposes, assume that the video receiver user uses the remote control unit 70 to select a sub-channel (SC) for viewing. The processor 60 uses the selection information provided by the remote control unit 70 via the interface 65 to appropriately configure the elements of the decoder 100 to receive the PTC corresponding to the selected sub-channel SC. After downconversion, the output signal for the selected PTC from unit 13 has a bandwidth of 6 MHz and a center frequency in the range 119-405 MHz. In the ensuing discussion, an RF channel or physical transmission channel (PTC) refers to an allocated broadcast transmission channel frequency band that has one or more sub-channels (also called virtual or logical channels).

Processor 60 configures the radio frequency (RF) tuner and intermediate frequency (IF) mixer and amplification stages of unit 13 to receive the selected PTC. The downconverted frequency output for the selected PTC is demodulated by unit 15 . The basic functions of the demodulator 15 are carrier frequency recovery and tracking, transmission data clock frequency recovery, and video data itself recovery. Unit 15 is also used to recover the sampling and synchronization clock corresponding to the transmitter clock and used to time the operation of processor 13, demodulator 15 and decoder 17. The recovered output from unit 15 is provided to decoder 17 .

The output from demodulator 15 is mapped to byte length data fields, deinterleaved and Reed-Solomon error corrected by unit 17 according to known principles. In addition, unit 17 provides processor 60 with a forward error correction (FEC) validity or lock indication. Reed-Solomon error correction is a well-known type of forward error correction. The FEC lock indication signal indicates that the Reed-Solomon error correction is synchronized to the data being corrected and provides a valid output. It should be noted that the demodulator and decoder functions performed by units 13, 15 and 17, respectively, are known and generally described, for example in the reference Digital Communication, Lee and Messerschmidt (Kluwer Academic Press, Boston, MA, USA, 1988).

Corrected output data from unit 17 is processed by an MPEG compatible transport processor and demultiplexer 22 . Individual packets containing specific program channel content or program specific information are identified by their Packet Identifier (PID). Processor 22 differentiates data according to type based on analysis of packet identifiers (PIDs) contained in packet header information and provides synchronization and error indication information for use in subsequent video, audio and data decompression.

The corrected output data provided to processor 22 is in the form of a transport stream containing program channel content and program specific information for a plurality of programs distributed over several sub-channels. The program specific information in this exemplary description describes the sub-channels present in the transport stream of a particular PTC. However, in another embodiment, the program specific information may also describe sub-channels located in other PTCs and delivered in different transport streams. These subchannel groups may be related to each other because their sources are specific broadcasters or because they occupy transmission bandwidth pre-allocated to analog NTSC compatible broadcast channels. Additionally, processor 60, operating in conjunction with processor 22, identifies and assembles the individual packets in the transport stream containing the selected program channel by using the PID contained in the program specific information.

Currently, analog video channels and digital video channels are allocated to individual broadcasters. Assign all analog video channels together to one end of the spectrum, and all digital video channels together to the other end of the spectrum. However, the order of the channels may be determined by the television receiver manufacturer. For example, during a channel scan operation, all analog video channels may be scanned first, followed by digital video channels. Alternatively, channels may be scanned according to the broadcaster, for example, digital video channels for the broadcaster may be scanned after analog video channels associated with the broadcaster have been scanned.

As described above, digital video channels can be divided into sub-channels by broadcasters. In this case, the sub-channels are designated by their respective major and minor channel numbers, where the first channel number or major channel number refers to the broadcaster and the second or minor channel number refers to the digital video channel The subchannel number in . For example, a broadcaster in New York may use major channel number 5 and have subchannels 5-1 through 5-4 in its assigned digital video channel. Channels or sub-channels that may have major and minor channel numbers associated with each other and are multiplexed with other digital video channels are generally referred to as virtual channels. During a channel scanning operation, a television receiver typically scans through each of the minor channels across all major channels before reaching the channel associated with the next major channel.

Figures 2-4 show other configurations suitable for use with the present invention in which a television receiver device is connected to an AVHDD for recording program data received by the television device.

FIG. 2 shows a set-top box/satellite access box 202 as a TV tuner (digital content input source). Television device 204 establishes a peer-to-peer connection between IEEE 1394 compliant set-top/satellite box 202 and AVHDD 206 . EIA-931-A arrows indicate IEEE1394 connections, while IEC-61883 arrows indicate audio/video equipment digital interface protocols.

FIG. 3 shows a set top box/satellite access box 302 as an input source of TV digital content in PVR mode. Television set 304 establishes a peer-to-peer network connection between IEEE 1394 compliant STB/SAB 302 and AVHDD 306 in accordance with the principles of the present invention. The IEC-61883 arrow indicates the audio/video equipment digital interface protocol between AVHDD 306 and television set 304 .

Figure 4 shows a set-top box/satellite access box 402 acting as a TV tuner (digital content input source) in PVR mode. Television set 404 establishes a peer-to-peer connection between IEEE 1394 compliant set-top/satellite box 402 and AVHDD 406 in accordance with the principles of the present invention. The IEC-61883 arrow indicates the audio/video equipment digital interface protocol between the AVHDD 406 and the television set 404 , and the EIA-931-A arrow indicates the IEEE1394 connection between the television set 404 and the set-top/satellite access box 402 .

As discussed herein, a recording operation refers to the operation of transferring and storing a program signal received from a selected video channel into a buffer of an attached or integrated storage device by a television signal receiver that This may include a set-top box or a satellite access box. Since a television receiver does not necessarily have an MPEG encoder in it, there may be problems in performing a recording operation during a channel change when an analog video channel is selected. If a television receiver does not include an MPEG encoder, the television cannot transfer digital video data to a storage device for enabling the PVR function. According to the invention, if a television receiver is operating in recording mode, i.e. transferring received video data via a digital bus to a buffer in a storage device, while receiving a channel scan command, the television receiver tunes to the next Digital video channels, skipping any intervening analog video signals. Likewise, if the television receiver is operating in recording mode and a direct channel selection command is received, wherein the selected channel is an analog channel, the television receiver terminates the recording operation and tunes to the selected analog video channel. If the selected channel is a digital channel, the television receiver selects that channel and continues the recording operation.

Another problem in the system described above is the handling of channel changes in the case of major and minor channels in recording mode. PID filtering can be enabled or disabled when receiving and processing sub-channels within the main channel. If PID filtering is enabled, only packets associated with the selected sub-channel are selected, so that only a small amount of data needs to be stored in the buffer. If PID filtering is disabled, all data packets associated with the digital video channel will be stored into the buffer. According to the present invention, when the selected channel is another minor channel in the current main channel and PID filtering is started, the temporary buffer is cleared and a new channel is selected, otherwise the temporary buffer will not be cleared before a new channel is selected, which This allows the user to review stored program data from the previous sub-channel. If the selected channel is a subchannel in the new main channel, the temporary buffer is always empty until the new channel is selected. In an exemplary embodiment, a user may selectively enable PID filtering. Alternatively, the PID filtering can be set as a default state by the television receiver, where the user can override the default state as desired.

Figure 5 is a flowchart illustrating the steps associated with the method according to the invention. Method 500 includes step 502, wherein when a digital video channel is selected for viewing, the device operates in a recording or PVR mode. In this mode, the received video signal is continuously transferred to the storage device while the television set waits for a channel change command.

Once a channel change command is received at step 504, it is determined whether the channel change command is in the form of a channel up or channel down command (channel scan command), or a direct channel selection command. If the channel change command is in the form of a direct channel selection command, the method proceeds to step 506 where it is determined whether the selected channel is an analog video channel or a digital video channel. If the selected channel is an analog video channel, the method proceeds to step 508 where the recording mode is terminated and the device tunes to the selected channel and processes the received analog video signal.

If the selected channel is a digital video channel, the method proceeds to step 516 where it is determined whether the selected channel is a sub-channel of the same major channel or a minor channel of a new major channel. If the former, the method proceeds to step 518 where it is determined whether PID filtering is enabled or disabled. If PID filtering is enabled, then at step 520 the temporary buffer is emptied and at step 522 the selected next sub-channel is selected. If PID filtering is disabled, the next selected sub-channel is selected at step 522 without emptying the temporary buffer.

If it is determined in step 516 that the selected channel is a new minor channel in the new major channel, then the method enters into step 524, in step 524, clears the temporary buffer, and enters in step 526, in step 526 tunes to the selected channel. The method then returns to step 502 and the recording mode continues.

If in step 504 it is determined that the channel change command is a channel scan command, i.e. a channel increase or channel decrease command, then the method proceeds to step 512 where it is determined whether the next channel in the channel list is an analog video channel or a digital video channel channel. If the next channel is an analog video channel, then at step 514 the method skips that analog video channel and any other intervening analog video channels and tunes to the next digital video channel. If the next channel is a digital video channel, the method proceeds to step 516 and continues as described above.

Claims (16)

1, a kind of method that is used for the control of video signal processing apparatus comprises the steps:

Response with use channel scanning pattern and directly one of them the corresponding user's input of channel selection command of channel selecting mode, from a plurality of video channels that comprise digital video channel and analog video channel, select video channel;

In response to the activation of digital recording pattern, the programme signal that will receive via selected digital video channel is sent to memory device;

In the time of in being in the digital recording pattern, import a new video channel of selecting in a plurality of digital video channels and the analog video channel in response to the user, wherein

If used the channel scanning pattern, then be chosen in the next digital video channel in the channel scanning order, and skip any channel of analog video therebetween between current selected video channel and the next digital video channel in the channel scanning order, and keep the digital recording pattern;

If wherein the user imports and uses direct channel selecting mode, and selected channel is corresponding to the analog video channel, then select this analog video channel and stop digital recording mode, if and selected channel is then selected this digital video channel and is kept this digital recording pattern corresponding to digital video channel.

2, method according to claim 1, wherein the user in response to the predetermined key on user input device selects to start the digital recording pattern.

3, method according to claim 1, wherein the user in response to the digital video signal channel selects to start the digital recording pattern.

4, method according to claim 1, wherein programme signal is stored in the appointment buffer in the memory device.

5, method according to claim 4, wherein memory device comprises the hard disc apparatus that links to each other with TV set device via the IEEE1394 bus.

6, method according to claim 4, wherein come the designation number video channel by each dominant frequency Taoist monastic name and time channel, if and the wherein new video channel of selecting then empties any programme signal that is stored in the temporary transient buffer corresponding to a sub-channel with new dominant frequency Taoist monastic name.

7, in a single day method according to claim 4 also comprises the step that has determined whether to start PID filtering, if start, then selects new digital video channel, just empty any programme signal that is stored in the temporary transient buffer.

8, method according to claim 4, also comprise the step that has determined whether to start PID filtering, if be not activated, and wherein come the designation number video channel by each dominant frequency Taoist monastic name and time channel, then only when the new video channel of selecting when having sub-channel of new dominant frequency Taoist monastic name, empty any programme signal that is stored in the temporary transient buffer.

9, a kind of video signal processing apparatus comprises:

Be used to receive and comprise and use channel scanning pattern and direct one of them the receiving system of user's input of channel selection command of channel mode;

Be used in response to channel selection command select a plurality of digital video channels and analog video channel one of them and be used to obtain the choice device of the programme signal that is associated with selected one of them video channel;

Be used for when equipment is in recording mode, selected programme signal be sent to the conveyer of memory device via number bus; And

Be connected with receiving system, choice device and conveyer, be used for importing the control device of the operation of this equipment of control in response to the user, if the channel selection command that is wherein received uses the channel scanning pattern, then choice device is chosen in the next digital video channel in the channel scanning order, and skip any channel of analog video therebetween between current selected video channel and next digital video channel, keep the digital recording pattern; If the channel selection command that is received uses direct channel selecting mode, and selected channel is corresponding to the analog video channel, then choice device is selected this analog video channel and is stopped digital recording mode, if and selected channel is corresponding to digital video channel, then this choice device selects this digital video channel and this equipment to keep the digital recording pattern.

10, equipment according to claim 9, wherein control device selects to start the digital recording pattern in response to the user of the predetermined key on a user input apparatus.

11, equipment according to claim 9, wherein control device selects to start the digital recording pattern in response to the user of digital video signal channel.

12, equipment according to claim 9, wherein programme signal is stored in the appointment buffer in the memory device.

13, equipment according to claim 9, wherein memory device comprises the hard disc apparatus that links to each other with TV set device via the IEEE1394 bus.

14, equipment according to claim 13, wherein come the designation number video channel by each dominant frequency Taoist monastic name and time channel, if and wherein newly the video channel of selection is corresponding to a sub-channel with new dominant frequency Taoist monastic name, then control device makes the storage device situation be stored in any programme signal in the temporary transient buffer.

15, equipment according to claim 13, wherein control device determines whether to have started PID filtering, if start, then in case select a new digital video channel, storage device is emptied be stored in any programme signal in the temporary transient buffer.

16, equipment according to claim 13, wherein control device determines whether to have started PID filtering, if be not activated, and wherein come the designation number video channel by each dominant frequency Taoist monastic name and time channel, then only when the new video channel of selecting when having sub-channel of new dominant frequency Taoist monastic name, storage device is emptied be stored in any programme signal in the temporary transient buffer.

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